#
# Copyright (c) 2024–2025, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#


import datetime
import os
import wave

from dotenv import load_dotenv
from loguru import logger

from pipecat.audio.filters.aic_filter import AICFilter
from pipecat.audio.turn.smart_turn.base_smart_turn import SmartTurnParams
from pipecat.audio.turn.smart_turn.local_smart_turn_v3 import LocalSmartTurnAnalyzerV3
from pipecat.audio.vad.vad_analyzer import VADParams
from pipecat.frames.frames import LLMRunFrame
from pipecat.pipeline.pipeline import Pipeline
from pipecat.pipeline.runner import PipelineRunner
from pipecat.pipeline.task import PipelineParams, PipelineTask
from pipecat.processors.aggregators.llm_context import LLMContext
from pipecat.processors.aggregators.llm_response_universal import LLMContextAggregatorPair
from pipecat.processors.audio.audio_buffer_processor import AudioBufferProcessor
from pipecat.runner.types import RunnerArguments
from pipecat.runner.utils import create_transport
from pipecat.services.cartesia.tts import CartesiaTTSService
from pipecat.services.deepgram.stt import DeepgramSTTService
from pipecat.services.openai.llm import OpenAILLMService
from pipecat.transports.base_transport import BaseTransport, TransportParams
from pipecat.transports.daily.transport import DailyParams
from pipecat.transports.websocket.fastapi import FastAPIWebsocketParams

load_dotenv(override=True)


# Create audio buffer processor so we can hear the audio fitler results.
audiobuffer = AudioBufferProcessor(
    num_channels=2,  # 1 for mono, 2 for stereo (user left, bot right)
    enable_turn_audio=False,  # Enable per-turn audio recording
)


def _create_aic_filter() -> AICFilter:
    license_key = os.getenv("AICOUSTICS_LICENSE_KEY", "")

    return AICFilter(
        license_key=license_key,
        enhancement_level=0.5,
    )


# We store functions so objects (e.g. SileroVADAnalyzer) don't get
# instantiated. The function will be called when the desired transport gets
# selected.
transport_params = {
    "daily": lambda: (
        lambda aic: DailyParams(
            audio_in_enabled=True,
            audio_out_enabled=True,
            vad_analyzer=aic.create_vad_analyzer(lookback_buffer_size=6.0, sensitivity=6.0),
            turn_analyzer=LocalSmartTurnAnalyzerV3(params=SmartTurnParams()),
            audio_in_filter=aic,
        )
    )(_create_aic_filter()),
    "twilio": lambda: (
        lambda aic: FastAPIWebsocketParams(
            audio_in_enabled=True,
            audio_out_enabled=True,
            vad_analyzer=aic.create_vad_analyzer(lookback_buffer_size=6.0, sensitivity=6.0),
            turn_analyzer=LocalSmartTurnAnalyzerV3(params=SmartTurnParams()),
            audio_in_filter=aic,
        )
    )(_create_aic_filter()),
    "webrtc": lambda: (
        lambda aic: TransportParams(
            audio_in_enabled=True,
            audio_out_enabled=True,
            vad_analyzer=aic.create_vad_analyzer(lookback_buffer_size=6.0, sensitivity=6.0),
            turn_analyzer=LocalSmartTurnAnalyzerV3(params=SmartTurnParams()),
            audio_in_filter=aic,
        )
    )(_create_aic_filter()),
}


async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
    logger.info(f"Starting bot")

    stt = DeepgramSTTService(api_key=os.getenv("DEEPGRAM_API_KEY"))

    tts = CartesiaTTSService(
        api_key=os.getenv("CARTESIA_API_KEY"),
        voice_id="71a7ad14-091c-4e8e-a314-022ece01c121",  # British Reading Lady
    )

    llm = OpenAILLMService(api_key=os.getenv("OPENAI_API_KEY"))

    messages = [
        {
            "role": "system",
            "content": "You are a helpful LLM in a WebRTC call. Your goal is to demonstrate your capabilities in a succinct way. Your output will be spoken aloud, so avoid special characters that can't easily be spoken, such as emojis or bullet points. Respond to what the user said in a creative and helpful way.",
        },
    ]

    context = LLMContext(messages)
    context_aggregator = LLMContextAggregatorPair(context)

    pipeline = Pipeline(
        [
            transport.input(),  # Transport user input
            stt,  # STT
            context_aggregator.user(),  # User responses
            llm,  # LLM
            tts,  # TTS
            transport.output(),  # Transport bot output
            audiobuffer,  # write audio data to a file
            context_aggregator.assistant(),  # Assistant spoken responses
        ]
    )

    task = PipelineTask(
        pipeline,
        params=PipelineParams(
            enable_metrics=True,
            enable_usage_metrics=True,
        ),
        idle_timeout_secs=runner_args.pipeline_idle_timeout_secs,
    )

    @transport.event_handler("on_client_connected")
    async def on_client_connected(transport, client):
        logger.info(f"Client connected")
        await audiobuffer.start_recording()
        # Kick off the conversation.
        messages.append({"role": "system", "content": "Please introduce yourself to the user."})
        await task.queue_frames([LLMRunFrame()])

    @audiobuffer.event_handler("on_audio_data")
    async def on_audio_data(buffer, audio, sample_rate, num_channels):
        # Save or process the composite audio
        timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = f"./conversation_{timestamp}.wav"

        # Create the WAV file
        with wave.open(filename, "wb") as wf:
            wf.setnchannels(num_channels)
            wf.setsampwidth(2)  # 16-bit audio
            wf.setframerate(sample_rate)
            wf.writeframes(audio)

        logger.info(f"Saved recording to {filename}")

    @transport.event_handler("on_client_disconnected")
    async def on_client_disconnected(transport, client):
        logger.info(f"Client disconnected")
        await task.cancel()

    runner = PipelineRunner(handle_sigint=runner_args.handle_sigint)

    await runner.run(task)


async def bot(runner_args: RunnerArguments):
    """Main bot entry point compatible with Pipecat Cloud."""
    transport = await create_transport(runner_args, transport_params)
    await run_bot(transport, runner_args)


if __name__ == "__main__":
    from pipecat.runner.run import main

    main()
